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A.D. Storrs, S. Bank, H. Gerhardt (Towson Univ.), K. Makhoul (MIT)
We present reconstructions of images of 22 large main belt asteroids that were observed by Hubble Space Telescope with the Wide-Field/Planetary cameras. All images were restored with the MISTRAL program (Mugnier, Fusco, and Conan 2003) at enhanced spatial resolution. This is possible thanks to the well-studied and stable point spread function (PSF) on HST. We present some modeling of this process and determine that the Strehl ratio for WF/PC (aberrated) images can be improved to 130 ratio of 80
We will report sizes, shapes, and albedos for these objects, as well as any surface features. Images taken with the WFPC-2 instrument were made in a variety of filters so that it should be possible to investigate changes in mineralogy across the surface of the larger asteroids in a manner similar to that done on 4 Vesta by Binzel et al. (1997). Of particular interest are a possible water of hydration feature on 1 Ceres, and the non-observation of a constriction or gap between the components of 216 Kleopatra.
Reduction of this data was aided by grant HST-GO-08583.08A from the Space Telescope Science Institute.
References:
Mugnier, L.M., T. Fusco, and J.-M. Conan, 2003. JOSA A (submitted)
Binzel, R.P., Gaffey, M.J., Thomas, P.C., Zellner, B.H., Storrs, A.D., and Wells, E.N. 1997. Icarus 128 pp. 95-103
The author(s) of this abstract have provided an email address for comments about the abstract: astorrs@towson.edu
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.